It is designed for use with the public key systems.

It is very important to understand the key system in order to be able to transpose.

"But it seems to be tied in to more than one of the ship's key systems."

The clock has a mechanical key system, which is wound every day.

The report said some key systems that would be needed as an initial part of the program were still "missing."

A public key system permits two parties who have never met to exchange secret information.

But it is a mission rule not to start out with any key system less than fully operational.

I think we can count on them coming out, with an intent to take control of key systems.

Although the credit goes to those people, Boehm's name was given to that key system.

He could probably take half the key planetary systems in the next six or eight years.